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Status of OPERA

Status of OPERA. OPERA Collaboration Nagoya University M. Komatsu. Contents. Experiment overview Construction status @ LNGS Spectrometer and Support structure Target Tracker (TT) Brick Manipulation System (BMS) Emulsion status @ Japan Production @ Fuji film

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Status of OPERA

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  1. Status of OPERA OPERA Collaboration Nagoya University M. Komatsu NOON04 Status of OPERA

  2. Contents • Experiment overview • Construction status @ LNGS • Spectrometer and Support structure • Target Tracker (TT) • Brick Manipulation System (BMS) • Emulsion status @ Japan • Production @ Fuji film • Emulsion refresh facility @ Tono mine • Schedule NOON04 Status of OPERA

  3. 36+1 groups ~ 165 physicists Belgium IIHE(ULB-VUB) Brussels COLLABORATION Bulgaria SofiaUniversity China IHEP Beijing, Shandong Croatia Zagreb University France LAPP Annecy, IPNL Lyon, LAL Orsay, IRES Strasbourg Germany Berlin, Hagen, Hamburg, Münster, Rostock Israel Technion Haifa Italy Bari, Bologna, LNF Frascati, L’Aquila, LNGS, Naples, Padova, Rome, Salerno Japan Aichi, Toho, Kobe, Nagoya, Utsunomiya • Korean group joined Korea Gyeongsang Russia INR Moscow, ITEP Moscow, JINR Dubna, Obninsk Switzerland Bern, Neuchâtel Turkey METU Ankara NOON04 Status of OPERA

  4. Nominal n beam  ( m-2 / pot) 7.45x10-9  CC / pot / kton 5.44x10-17 < E > ( GeV ) 17 (e + e) /  0.85 %  /  2.0 % tprompt negligible The CNGS beam CERN to Gran Sasso L=730km Designed for nt appearance experiment NOON04 Status of OPERA

  5. 8 cm 8 m OPERA/CNGS1 an hybrid detector Target Trackers Pb/Em. target supermodule Pb/Em. brick Basic “cell” Extract selected brick 1 mm Pb Emulsion Emulsion analysis  vertex  decay kink  e/g ID, multiple scattering, kinematics • Electronic detector • finds the brique of n interaction • m ID, charge et p NOON04 Status of OPERA

  6. N.Nonaka, M.Komatsu(Nagoya Univ. ) K.Kodama (Aichi Univ of Edu.) R&D @ Nagoya for DONUT Analysis. 膨大な ごみ飛跡の中から Event Reconstruction Interaction Point t Decay Point of t neutrino Reject Low momentum tracks (114 tracks remained） Vertex detection : Neutrino interaction and decay of short lived particles Reject passing through tracks (420 tracks remained） All tracks in the Scanning region（4179 tracks） Detection of ντCCin DONUT NOON04 Status of OPERA

  7. 3 YEARS 5 YEARS 3s 3s 4s 4s SK 90%CL SK 90%CL Expected number of events full mixing, 5 years run @ 6.76x1019 pot / year NOON04 Status of OPERA

  8. Events Preliminary nm ne Dm223 (eV2) ne beam nm nt 2.5x10-3 eV2 NC 4.50 1019 pot/yr 6.76 1019 pot/yr 0.06  7° Missing pT (GeV) sin22q13 OPERA sensitivity to q13 Only 15% increase scanning because the event location is already performed for nt search. By fitting simultaneously the Ee, missing pT and Evis distributions we got the sensitivity at 90% NOON04 Status of OPERA syst. on the ne contamination up to 10%

  9. brick packing Pb-emulsion stacking 4 m corridor 48 m OPERA Experiment Layout in the Underground lab Underground assembly space (2003 - 2006) BAM Borexino Hall B Hall C Emulsion storage NOON04 Status of OPERA

  10. Dipolar Magnet : Construction • Iron slabs ordered and being delivered • Yokes, coils, supplies ordered • starts installation : may 2003 , resumed august 03 • Will be Finished in Early 2005 Hall C Gran Sasso NOON04 Status of OPERA

  11. NOON04 Status of OPERA

  12. Cosmic ray test setup 4x4 m2 Glass RPC for trigger and tracking • 36 OPERA RPC under test • Horizontal and vertical strips with 3.5cm pitch and digital readout. • In total 5000 channels • The current of each RPC measured with 2nA resolution and monitored during the test. • Gas • 12 parallel lines • 3 RPC in series (like in OPERA detec.) • 48% Ar, 48%, 4% isobutane  We arerequesting gas operation for RPC test @ Hall C NOON04 Status of OPERA

  13. TT module construction • Construction procedure well established after wall 0 construction, • Construction will start the 9th of February • Procedure of tests and calibration already established. • About 10% of strips already delivered. (3,000/32,256) Wall 0 constructed @ Strasbourg NOON04 Status of OPERA

  14. Fibre gluing system new system old system • glue-hardener mixing done before filling syringes, • change syringes after every gluing, • problem with exothermic reaction (brutal glue temperature elevation), • 16 strips glued at the same time. • glue-hardener mixing during gluing, • just clean and reuse syringes (once per day), • 2x16 strips glued at the same time, • at least 160 strips/day. NOON04 Status of OPERA

  15. Target Tracker (assembly at Strasbourg) Well above 5 p.e. / readout end (in the middle: worst case for two-end readout) Trigger + Brick Finding 7m • XY planes, 7000m2 in total • 32256 Scintillator strips7m x 2.5cm x1cm • AMCRYS-H (Kharkov) + Kuraray WLS • 1000 MaPMT Hamamatsu 64channels • Dedicated Front End electronics for gain correction • Autotriggerable and threshold @ 1/5 p.e NOON04 Status of OPERA

  16. x-y scanning table x-y scanning tables • 2 tables are necessary for the production, • table 1 ready, we are waiting for electronics to start testing wall 0, • table 2 ordered and ready by beginning of February 2004, • 5 electron spectrometers ready and calibrated (2/table + 1 spare). DAQ cards (at least prototypes) urgently needed to prepare module scanning procedure. DAQ board ROCs PMT FE board LED LED HV- module NOON04 Status of OPERA LED-pulser

  17. delivery Delivery at Gran Sasso storage in hall B 1400 m n OPERA NOON04 Status of OPERA

  18. The support structure for the “brick walls" Suspension from the top • Full size proto built by ILMA • Delivery at LNGS : june 2004 • Installation schedule is same as TT Height ~ 6.7 m wall Tensioning from the bottom NOON04 Status of OPERA Brickloading test

  19. Brick Manipulator System (BMS) To perform quasi-online analysis, daily extraction Will be done by BMS NOON04 Status of OPERA

  20. BMS prototype tests with VV Naples-Frascati wall CCD Camera The Vacuum sucker Vehicle (VV) VV cable loop driving system VV cable 50 bricks/day ~ 3 hours NOON04 Status of OPERA

  21. Element of the OPERA detector ECC Brick(8.3kg) Total Number of ECC bricks : 206,336 Bricks Vacuum Packed NOON04 Status of OPERA

  22. ECCBrick Sandwich of Emulsion Films and Lead Plates Lead Plates（１mm thick）　56/Brick Emulsion films 58/Brick Weight 8.3 kg 125mm 200,000 bricks 12,000,000 emulsion plate 100mm 100mm 125mm NOON04 Status of OPERA Pb Plates Emulsion films

  23. Emulsion refresh developed in Nagoya University with Fuji film Co. Key feature for OPERA experiment to get low BG emulsion. Production Beam exp. Initial sensitivity Grain density 35/100mm Develop Refresh result Grain density ~8/100mm Production Beam exp. Refresh process Develop Temp. 30℃, R.H. 98%, 3days Nearly perfect erasing Sensitivity aging after refresh Grain density 35/100mm Production Refresh process Beam exp. Develop No sensitivity degradation after refresh NOON04 Status of OPERA

  24. Refresh Facility Tono Mine Cosmic ray reduction 1st hall : 45m deep, 1/50(115m.w.e.) 2nd hall : 96m deep, 1/400(220m.w.e.) Japan Nuclear Cycle Development Institute Tono Geoscience Center 1st Hall Tono Mine 2nd Hall Tokyo Osaka Nagoya NOON04 Status of OPERA

  25. Tono Mine : 2nd Hall @ 96m before construction (Mar. ’03) NOON04 Status of OPERA

  26. Installation of 14 refresh chambers in 2nd hall. (May.-Jul. ’03) NOON04 Status of OPERA

  27. Spread emulsion films on tray. NOON04 Status of OPERA

  28. Store trays into refresh chamber. 8,100 films / chamber NOON04 Status of OPERA

  29. Four people work in same time NOON04 Status of OPERA

  30. To be refreshed, films delivered from Fuji film. (May. 26 ’03) A box contain 2030 films : 1,654,914 films are already delivered.(14% of total) NOON04 Status of OPERA

  31. m^2 Numberofrefreshedfilms expected line → Real refresh started on Jan/13/2004 1st facility is not full run yet. If both facility runs with full force, 520m^2 films are refreshed in a day. Already Refreshed both facility full speed run Stored in Tono Mine (about 14%) . completion of 2nd facility 1st facility full speed run Jan.,2003 Jan.,2004 Jan.,2005 Oct.,2005 NOON04 Status of OPERA

  32. Our goal is 3,600m (300mm x 12,000,000 films) GOAL Fuji Film Co. 14% of total Processed 1.3% of total NOON04 Status of OPERA

  33. Milestones and Conclusion • Milestones • november 2003 starts SM1 Magnet RPC installationOK • September 2004 starts SM1 Target installation • January 2005 BAM and BMS installation • July 2005 starts filling bricks • Important Physics Program • First evidence of nm-nt appearance in few years data taking • In a five years run: 11 signal(SK best fit)and 1.06 background events • Studies to improve efficiency and to reduce the background • Significant measurement of q13(7°@2.5x10-3eV2 Preliminary) NOON04 Status of OPERA

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